1998 pontiac sunfire 02 sensors

[kddy29]

Hello, I have a pontiac sunfire and its missing the 2nd o2 sensor after a new exhaust was put on. I have a check engine light on and the code is for heated o2 sensor bank 1. I was told not to bother replacing it since I don't have the second one. Is this good advice or should I change it. My car runs rough and will die sometimes just until it warms up. Thanks

 

[melsg5]

The rough running has nothing to due with the sensor. Problem is unless you constantly check with a scanner you will never know if a new code has popped up since you are missing the sensor.

 

[kddy29]

As oxygen sensor plays a significant role in regulating the air/fuel mixture, engine timing and intervals between engine combustion, there is no doubt that a vehicle with a bad oxygen sensor will run roughly and/or irregularly. Rough engine idle is mostly caused in vehicles that are installed with a defective oxygen sensor.

 

[melsg5]

That pertains to the number 1 sensor not the number 2. Read below concerning defective number 2 sensor particularly no noticeable symptoms.

http://www.obd-codes.com/p0137

______________________________

 

[manic mechanic]

damned that was good mel. but wouldnt be easy to just braze in a new bung hole at put it back the way it was?................if it aint broke why break it?

 

[kddy29]

If you would have read my original post. It was about the FIRST O2 sensor and if I should change it. I didn't need any of the other information.

 

[melsg5]

Yes change it if that is what the code indicates. As the other post suggested, weld a fitting onto the pipe so you can hook up the missing sensor.

 

[manic mechanic]

Hello, I have a pontiac sunfire and its missing the 2nd o2 sensor after a new exhaust was put on.

i read your post.....................^^^^^^^

______________________________